More than 32 percent of all deaths of 15 through 20 year-olds result from motor vehicle crashes. In 1996, 36.6 percent of the 6,319 traffic fatalities of 15 through 20 year-olds were alcohol-related. The U.S. Department of Transportation's National Highway Traffic Safety Administration encourages States to enact zero tolerance laws to reduce drinking and driving by younger drivers. Such laws should establish that any measurable amount (a maximum of 0.02) of alcohol in the blood, breath, or urine of a driver under age 21 would be an "illegal per se" offense. Such laws should also provide for the immediate suspension of the driver license for those under age 21 who exceed the applicable blood alcohol concentration (BAC) limit. All 50 States and the District of Columbia now have laws that prohibit the purchase and public possession of alcoholic beverages by those under the age of 21; therefore, it is reasonable to expect drivers under the age of 21 not to have any alcohol in their systems, and the appropriate BAC for these drivers would be zero; however, for enforcement purposes, some States have enacted laws that establish a BAC level of 0.02, at which it is illegal for those under the age of 21 to operate a motor vehicle. Several studies have shown conclusively that zero tolerance laws save lives by significantly reducing the number of fatal crashes that involve young drivers. Beginning in fiscal year 1999, States that do not consider a 0.02 BAC (or less) to be driving while intoxicated for drivers under age 21 will be subject to the withholding of Federal-Aid Highway Funds. States that do have such a law will be eligible for Section 410 (Highway Safety Act) drunk-driving incentive grant funds. 4 references and 1 figure